<div id='accordion'>
    <h2>Panel 1</h2>
    <div class='content'>
        N?i dung Panel 1
    </div>
    <h2>Panel 2</h2>
    <div class='content'>
        N?i dung Panel 2
    </div>
    <h2>Panel 3</h2>
    <div class='content'>
        N?i dung Panel 3
    </div>
    <h2>Panel 4</h2>
    <div class='content'>
        N?i dung Panel 4
    </div>
</div>